Figure 1
Receiver operating characteristic (ROC) curve analysis of laryngectomy prediction according to pretherapeutic SUVmax of primary tumor. (A) ROC curve for all patients showing lack of significant correlation (area under the curve (AUC) = 0.595 (95% CI = 0.460–0.730, P = 0.171). (B) ROC in hypopharyngeal cancer patients only. The area under the ROC curve was 0.715 (95% CI = 0.562–0.868, P = 0.016) and 9.5 was determined as best potential cutoff value for comparison. The sensitivity and specificity for SUVmax = 9.5 were 92.9% and 37.2%, respectively. (C) ROC curve in laryngeal cancer patients showing lack of significant correlation (AUC = 0.455 (95% CI = 0.241–0.699, P = 0.686).
